screen burn in and screen flicker is totally different ... screen or display burn in generally occurs in optical led or amoled display when someone stick inside any particular apps of games for hour and hours in high brightness or using any bright wallpaper in high brightness or use device within adaptive brightness into direct sunlight... the tendency of display burn in then create a mirror image of that logo or anything just beneath the display.. and there is none of the things that can solve it except display changes in case of amoled or optical led display .... screen flicker occurs in 2 ways 1st either the display got damaged or 2nd can be happened for display connector plug in ..... a software can also responsible to create that issue if by chance that software not installed fully or correctly and basically it happened when anyone simply installed any software via mobile data or wifi where the actual and recommended method in especially samsung devices is to install any software via smart switch and pc or via Odin or through authorized samsung service center as they use Odin only for official purposes otherwise possible software loop hole formation can do anything mysterious with device where samsung provides non A/B partition type ota software not like other company.......and in both of case you need to visit nearest samsung service center 🙂👍
Please perform the below mentioned steps to resolve the issue:
* Check device in safe mode: Press and hold the Power key, when Power off icon appears > Press and hold the power off icon. To exit safe mode: Restart your device.
For further assistance, register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Error report/Ask questions).
